Implement v1 of the healthcheck and create github files for open source

.github/CODEOWNERS

@@ -0,0 +1 @@
+@vechainfoundation/node-hosting-code-owners

CODE_OF_CONDUCT.md → .github/CODE_OF_CONDUCT.md

@@ -1,10 +1,10 @@
-# [Project Name] Code of Conduct
+Node Healthcheck Code of Conduct
 
 ## 1. Introduction
 
-The [Project Name] community is dedicated to providing a welcoming, inclusive, and harassment-free environment for everyone, regardless of age, gender, gender identity and expression, sexual orientation, disability, physical appearance, body size, race, ethnicity, nationality, religion, or technical experience. This Code of Conduct outlines our expectations for all members of the [Project Name] community, as well as the consequences for unacceptable behavior.
+The Node Healthcheck community is dedicated to providing a welcoming, inclusive, and harassment-free environment for everyone, regardless of age, gender, gender identity and expression, sexual orientation, disability, physical appearance, body size, race, ethnicity, nationality, religion, or technical experience. This Code of Conduct outlines our expectations for all members of the Node Healthcheck community, as well as the consequences for unacceptable behavior.
 
-We invite all those who participate in [Project Name] to help us create a safe and positive environment for everyone.
+We invite all those who participate in Node Healthcheck to help us create a safe and positive environment for everyone.
 
 ## 2. Expected Behavior
 
@@ -39,7 +39,7 @@ If a community member engages in unacceptable behavior, the community organizers
 
 ## 5. Reporting Guidelines
 
-If you are subject to or witness unacceptable behavior, or have any other concerns, please notify a community organizer as soon as possible. You can contact the project maintainer at [[email protected]].
+If you are subject to or witness unacceptable behavior, or have any other concerns, please notify a community organizer as soon as possible. You can contact the project maintainer at [email protected].
 
 Additionally, community organizers are available to help community members engage with local law enforcement or to otherwise help those experiencing unacceptable behavior feel safe. In the context of in-person events, organizers will also provide escorts as desired by the person experiencing distress.
 
@@ -53,7 +53,7 @@ We expect all community participants (contributors, paid or otherwise; sponsors;
 
 ## 8. Contact Information
 
-You can contact the project maintainer at [[email protected]].
+You can contact the project maintainer at [email protected].
 
 ## 9. License and Attribution
 

CONTRIBUTING.md → .github/CONTRIBUTING.md

@@ -1,40 +1,29 @@
-# CONTRIBUTING to [Your Project Name]
+# Contributing to Node Healthcheck
 
-First of all, thank you for considering to contribute to [Your Project Name]! Your help is invaluable to improve the project and make it more useful for the community. This document will guide you through the contribution process and make it easier for you to get started.
+First of all, thank you for considering to contribute to Node Healthcheck! Your help is invaluable to improve the project and make it more useful for the community. This document will guide you through the contribution process and make it easier for you to get started.
 
 ## Table of Contents
 
-- [CONTRIBUTING to \[Your Project Name\]](#contributing-to-your-project-name)
+- [Contributing to Node Healthcheck](#contributing-to-node-healthcheck)
   - [Table of Contents](#table-of-contents)
   - [Code of Conduct](#code-of-conduct)
-  - [Getting Started](#getting-started)
   - [How to Contribute](#how-to-contribute)
     - [Reporting Bugs](#reporting-bugs)
     - [Suggesting Enhancements](#suggesting-enhancements)
     - [Pull Requests](#pull-requests)
+      - [How to submit a pull request](#how-to-submit-a-pull-request)
   - [Style Guide](#style-guide)
   - [Additional Resources](#additional-resources)
 
 ## Code of Conduct
 
 By participating in this project, you agree to abide by our [Code of Conduct](CODE_OF_CONDUCT.md). Please read it to ensure a welcoming and inclusive environment for all contributors.
 
-## Getting Started
-
-1. Fork the repository on GitHub.
-2. Clone your fork to your local machine.
-3. Create a new branch for your feature or bugfix.
-   1. Use `git checkout -b feature/your-feature-name` for features.
-   2. Use `git checkout -b bugfix/your-bugfix-name`) for bugfixes.
-4. Make your changes and commit them to your new branch.
-5. Push your changes to your fork.
-6. Open a pull request against the main branch of the original repository.
-
 ## How to Contribute
 
 ### Reporting Bugs
 
-If you find a bug, please create a new issue in the [issue tracker](https://github.com/vechainfoundation/your_project_name/issues). When submitting a bug report, please include:
+If you find a bug, please create a new issue in the [issue tracker](https://github.com/vechainfoundation/node-healthcheck/issues). When submitting a bug report, please include:
 
 - A clear and descriptive title.
 - A detailed description of the issue, including the steps to reproduce the bug.
@@ -43,7 +32,7 @@ If you find a bug, please create a new issue in the [issue tracker](https://gith
 
 ### Suggesting Enhancements
 
-If you have an idea for a new feature or improvement, please create a new issue in the [issue tracker](https://github.com/vechainfoundation/your_project_name/issues). When suggesting an enhancement, please include:
+If you have an idea for a new feature or improvement, please create a new issue in the [issue tracker](https://github.com/vechainfoundation/node-healthcheck/issues). When suggesting an enhancement, please include:
 
 - A clear and descriptive title.
 - A detailed description of the proposed feature, including examples of how it should work.
@@ -60,11 +49,25 @@ If you would like to contribute code, documentation, or other assets to the proj
 - Make sure your code passes any tests and linters that the project uses.
 - Update any relevant documentation or comments.
 
+#### How to submit a pull request
+
+1. Fork the repository on GitHub.
+2. Clone your fork to your local machine.
+3. Create a new branch for your feature or bugfix based on the `main` branch.
+   1. Use `git checkout -b feature/your-feature-name` for features.
+   2. Use `git checkout -b bugfix/your-bugfix-name` for bugfixes.
+4. Make your changes and commit them to your new branch.
+5. Push your changes to your fork.
+6. Open a pull request against the main branch of the original repository.
+
+> :information_source: Tip:
+> Write your commit messages following [the git guidelines](https://git-scm.com/book/en/v2/Distributed-Git-Contributing-to-a-Project). Use present tense and imperative verbs, e.g. "Fix bug" and not "Fixed bug" or "Fixes bug.". Your commit message should describe what the commit, when applied, does to the code – not what you did to the code.
+
 ## Style Guide
 
 Please adhere to the project's coding style and conventions when contributing. This may include:
 
-- Code formatting rules (e.g., indentation, line length, etc.).
+- Code formatting (e.g., indentation, line length, etc.).
 - Naming conventions for variables, functions, classes, etc.
 - Commenting guidelines, including when and how to write comments.
 - Test-writing guidelines, including test coverage requirements.
@@ -77,6 +80,6 @@ If the project uses a specific code formatter or linter, please ensure your cont
 - [GitHub Help: Creating a pull request from a fork](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request-from-a-fork)
 - [Git Branching and Merging](https://git-scm.com/book/en/v2/Git-Branching-Basic-Branching-and-Merging)
 
-Once again, thank you for your interest in contributing to [Your Project Name]! Your support and collaboration are crucial to the success and growth of this project. If you have any questions or need additional guidance, please don't hesitate to reach out to the maintainers.
+Once again, thank you for your interest in contributing to Node Healthcheck! Your support and collaboration are crucial to the success and growth of this project. If you have any questions or need additional guidance, please don't hesitate to reach out to the maintainers.
 
 Happy coding!

.github/README.md

@@ -0,0 +1,129 @@
+# Node Healthcheck
+
+![Node Hosting Project Logo](images/node-hosting.png)
+
+## Introduction
+
+This is a simple API that checks the health of a vechain node by comparing the timestamp of its latest block with the current time. If the timestamp is within an acceptable tolerance setting, it is considered healthy.
+
+The main purpose of this tool is to be used in load balancers and availability monitors, to determine whether a node is not only online, but also fully synchronized with the blockchain. Moreover, it provides a `metrics` endpoint that is compatible with [prometheus](https://github.com/prometheus/prometheus) and exposes node health information to it. 
+
+The API contains two endpoints:
+
+- `/healthcheck`
+
+  used by ALB to determine whether the node is online
+
+- `/metrics`
+
+  used by Prometheus to collect health metrics, such as the last block timestamp, number of seconds since last block and node health status.
+
+![Node Hosting Design Diagram - Healthcheck](images/architecture-diagram-healthcheck.webp)
+
+## Table of Contents
+
+- [Node Healthcheck](#node-healthcheck)
+  - [Introduction](#introduction)
+  - [Table of Contents](#table-of-contents)
+  - [Getting Started](#getting-started)
+    - [Configuration](#configuration)
+      - [NODE\_URL](#node_url)
+      - [NODE\_HEALTHCHECK\_PORT](#node_healthcheck_port)
+      - [NODE\_HEALTHCHECK\_TOLERANCE\_IN\_SECONDS](#node_healthcheck_tolerance_in_seconds)
+    - [Using Node](#using-node)
+    - [Using Docker](#using-docker)
+      - [Release new docker image](#release-new-docker-image)
+    - [Contributing](#contributing)
+    - [Roadmap](#roadmap)
+    - [Changelog](#changelog)
+    - [License](#license)
+    - [Credits](#credits)
+
+## Getting Started
+
+You can run the application with node, or in a container using docker.
+
+### Configuration
+
+You may override the default configuration by modifying the `.env` file.
+
+#### NODE_URL
+
+The URL of the node to be monitored by the healthcheck. Defaults to `https://node-test.vechain.org`
+
+#### NODE_HEALTHCHECK_PORT
+
+The port of the healthcheck API. Defaults to `11012`
+
+#### NODE_HEALTHCHECK_TOLERANCE_IN_SECONDS
+
+The amount of seconds before the healthcheck classifies the node as `unhealthy`. Defaults to `15`
+
+### Using Node
+
+To install and run the application with [node version 16.20.2](https://nodejs.org/dist/v16.20.2/), run the following commands in the root directory of the project:
+
+```bash
+cd src
+npm ci
+npm start
+```
+
+### Using Docker
+
+To build and run the image with docker, run the following commands in the root directory of the project:
+
+```bash
+docker build . -t node-healthcheck:dev
+docker run -d \
+  --name node-hc \
+  -p 11012:11012 \
+  -e NODE_URL=https://mainnet.vechain.org \
+  node-healthcheck:dev
+```
+
+To download and run the image with docker:
+
+```bash
+docker run -d \
+  --name node-hc \
+  -p 11012:11012 \
+  -e NODE_URL=https://mainnet.vechain.org \
+  public.ecr.aws/vechainfoundation/node-healthcheck:latest
+```
+
+For more image tags, refer to our [Container Registry](https://gallery.ecr.aws/vechainfoundation/node-healthcheck).
+
+#### Release new docker image
+
+To release a new version of the exporter, follow these steps:
+1. If you haven't done so already, enable multi-architecture builds on your system:
+   1. Enable Docker BuildKit for multi-architecture builds by setting the environment variable in your shell profile: `export DOCKER_BUILDKIT=1`
+   2. Create Docker BuildKit builder on your system: `docker buildx create --use`
+2. You will also need to have the AWS CLI installed and configured with credentials for ECR through profile `prod-node-devops`.
+3. Run `./release.sh <version>` to build and push the image to ECR, where `<version>` is the tag for the new image.
+4. Verify that the new release was correctly pushed to [the docker repository](https://gallery.ecr.aws/vechainfoundation/node-healthcheck).
+
+### Contributing
+
+If you want to contribute to this project and make it better, your help is very welcome. Contributing is also a great way to learn more about social coding on Github, new technologies and and their ecosystems and how to make constructive, helpful bug reports, feature requests and the noblest of all contributions: a good, clean pull request.
+
+For more details and guidelines on how to contribute, refer to [CONTRIBUTING](CONTRIBUTING.md).
+
+### Roadmap
+
+We are planning to add more features to this application going forward. More details to follow and suggestions are always welcome in the form of [GitHub issues](https://docs.github.com/en/issues/tracking-your-work-with-issues/creating-an-issue).
+
+### Changelog
+
+- v1 [31-Mar-2023] Add prometheus metrics for node health
+- v0 [08-Feb-2023] Implement a basic healthcheck API for nodes, based on block timestamps
+
+### License
+
+This project is licensed under [the MIT license](LICENSE.md).
+
+### Credits
+
+Special recognition to the main contributors:
+- @fabiorigam

.github/workflows/build.yml

@@ -0,0 +1,56 @@
+name: Build
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  gitleaks:
+    name: GitLeaks
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE }}
+
+  sonarcloud:
+    name: SonarCloud
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0 # Shallow clones should be disabled for a better relevancy
+      - name: SonarCloud Scan
+        uses: SonarSource/sonarcloud-github-action@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./scripts
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Set up QEMU dependency
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build docker image
+        run: ./build.sh
+      - name: Run docker image
+        run: ./run.sh
+      - name: Smoke test
+        run: ./test.sh

.gitignore

@@ -0,0 +1 @@
+**/node_modules/*

Dockerfile

@@ -0,0 +1,33 @@
+# Build stage for amd64 architecture
+FROM --platform=linux/amd64 node:gallium-alpine3.18 AS builder-amd64
+
+WORKDIR /app
+# Copy the package.json and package-lock.json to the container
+COPY ./src/package*.json .
+RUN npm ci --ignore-scripts
+# Copy the rest of the application code to the container
+COPY ./src .
+
+# Build stage for arm64/v8 architecture
+FROM --platform=linux/arm64/v8 node:gallium-alpine3.18 AS builder-arm64
+
+WORKDIR /app
+# Copy the package.json and package-lock.json to the container
+COPY ./src/package*.json .
+RUN npm ci --ignore-scripts
+# Copy the rest of the application code to the container
+COPY ./src .
+
+# Production stage
+FROM node:gallium-alpine3.18 AS runtime
+
+RUN addgroup -S nonroot && adduser -S nonroot -G nonroot
+WORKDIR /app
+
+# Copy the files from the appropriate builder stage based on the target architecture
+COPY --from=builder-amd64 /app /app
+COPY --from=builder-arm64 /app /app
+USER nonroot
+
+# Set the default command to run when starting the container
+CMD ["npm", "start"]